Hi MRtrix experts,
To visualize brain tumors in my DWI images, i got the suggestion to calculate mean diffusivity maps.
Since it uses the diffusion tensor model, I selected only my lower b-values (b=0,700,1200) and left out the b=2800 shell.
I then computed the diffusion tensor (dwi2tensor dwi_input.mif -mask mask.nii dwi_dt.nii) and tried to extract the MD, which should be the same as the ADC (tensor2metric dwi_dt.nii -mask mask.nii -adc adc.nii).
However, what I end up with is just a white image with some black voxels, intensity ranging from -151 up to 124.
Does anyone have an idea on what might have gone wrong?
Thanks in advance!
Best regards,
Hannelore